Car-brake.



No. 866,904- I PATENTED SEPT. 24, 1907.

L.I ALLENBRAND.

CAR BRAKE. ArPLIoATIoN FILED 23.11. 1901.

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Y L. ALLENBRAND.

CAR BRAKE.

PPLIGATION :1mm APB. 11. 1907.

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LAWRENCE ALLENBRAND, OF BASEHOR, KANSAS.

C AR-B BAKE specification of Letters Patent.

Patented Sept. 24, 1907.

Application filed April 11,1907. Serial No. 367,519.

To all 'whom it may concern: i

Be it known that I, LAWRENCE ALLENBRAND, a citizen of the United States,residing at Basehor, in the county of Leavenworth, State of Kansas, haveinvented certain new and useful Improvements in Gar-Brakes; and I dohereby declare the following to be a full, clear, and exact descriptionof the invention, such as will enable others skilled in the art to whichit appertains to make and use the same.

This invention relates to new and useful improvements in brakes forstreet cars, and it has particular reference to a brake involving amanually operated lever, transmission connections and brake beamsoperated from said lever and carrying 'brake-shoes.

In connectionjwith a brake of the above type, the invention aims as aprimary object to provide a novel construction, combination, andarrangement of parts, the details of which will appear in the course ofthe following description in which reference is had to the accompanyingdrawings forming a part of this specilication, like characters oreference designating similar parts throughout the several views,wherein:

Figure 1 is a central longitudinal section of a streetcar brakeconstructed in accordance with the present invention; parts being shownin elevation. Fig. 2 is a top plan view thereof, the floor of the carbeing indicated by dotted lines; Fig. 3 is a vertical transverse sectionon the line 3-3 of Fig. 2, showing the brake beams and their associatedparts. Fig. 4 is a detailed perspective view of a bracket, 'in which aconnecting lever is pivoted.

Referring specifically to the accompanying drawings, the numeral 1designates the floor of the car, from which is suspended, rearwardly ofthe motormans platform, a casing 2, the latter being supported in spacedrelation to said oor and comprising a top 3, and depending sides 4, theends and bottom of said casing being open in order to permit of themovement of the brake beams therethrough. A tubular member 5 issupported vertically upon the front end of the platform 1 and has openends,the member 5 being in registry with an opening 6 provided in saidfloor. Projecting forwardly from the casing 2 is a bracket, which isillustrated more particularly in Fig. 4. This bracket designated by thenumeral 7 comprises a U-shaped open ended body portion formed at itsrear end with a depending apertured projection 8, by means of which itis secured to the front side wall of the casing 2.

A transmission lever 9 is pivoted at a point adjacent its front end, asat 10, between the vertical sides of thel bracket'2. Said lever at itsrear. end has pivotal connection, as at 11, with the vertically extendedarm 12 of a .brake beam 13, said brake beambeing formed with dependingspaced apertured ears 14 between which is pivotally received the upperend 15 of a brake beam 16, the brake beam 16 being twisted, midway itslength to dispose said upper end in a vertical plane. The brake beams 13and 16 are disposed in divergent relation, and at their outer ends carrybrake-shoes 17 which are designed for frictional engagement with thetrack wheels 18. In their divergent relation the brake beams 13 and 16are supported between respective pairs of spaced transverse frictionrollers 19, the latter being freely mounted upon pins 20 having theirends mounted in the side walls 4, and being4 disposed transverselytherebetween. The lever 9, at its front end, is enlarged and formed withan opening 21. Above said opening is a bearing plate 22, which registerstherewith, and a similar constructed bearing plate 23 is fixed on saidlever below said opening. A vertically movable rod 24 is disposed in themember 5 and is formed with a reduced lower end 26 which projectsthrough the bearing plates 22 and 23, and the opening 21 and whichcarries on its threaded end an adjusting nut 27, designed to soproportion the parts as to multiply or decrease movement of the lever 9,saidlever being operated from the rod 24. Surrounding said rod is anexpansive coil spring 28 having an end fixed thereto and bearing withits lower end against the plate 22. The rod 24 at its upper end, haspivotal connection, as at 29, with the front end of an operating lever30, the latter being pivoted as at 31 between rearwardly extendingspaced parallel ears 32, cast integral with the member 5. The ears 32are constructed on their vertical rounded faces with rack teeth 33, andthe lever 30 carries a sliding spring-pressed pawl 34, having anenlarged working end which is designed for engagement with said rackteeth.

The manner of operation will be readily apparent from the foregoingdescription. Downward movement of the lever 30 raises the rod 24, andthe latter, by virtue of the connections described, raises the front endof the lever 9, the rear end thereof being lowered to force the brakebeams 13 and 16 outwardly, whereby their brake-shoes 17 willfrictionally engage the track, and stop the movement of the car, itbeing of course understood that the power has been previously cut off.In like manner, upward movement of the lever 30 reverses the aboveoperation and releases the brakesh'oFes from the track wheel. The spring28 serves as a cushioning element as well as a yieldable fastening meansfor the rod 24, and prevents the parts from becoming affected by suddenshocks and vibrations.

From the foregoing description, it will be seen that simple andefficient means are'provided for accomplishing the objects of theinvention, but, while the elements herein shown and described, are welladapted to serve the functions set forth, it is obvious, that variousminor changes `may be made in the proportions, shape7 and arrangement ofthe several parts, without departing from the spirit and scope oi theinvention as defined in the appended claims.

What is claimed7 is: I

A car brake of the type set forth comprising an operating lever mountedfor pivotal movement on the platform of a ear, a casing suspended fromsaid platform, brake beams pivoted to one another at their upper endsand supported in said casing in divergent relation, and for downward andoutward movement through the ends thereof, brakeshoes carried by saidbeams, one of said beams having an extension, a stationary bracket, alever pivoted between its ends in said bracket, and at its rear end tosaid extension, and an operative connection between said lever und saidoperating; lever.

1n testimony whereof, I ax my signature, in presence of two witnesses.

LAWRENCE ALLENBRAND.

Witnesses .TOSUAU T. WILLIAMS, ERNST Elink/rrr.

